Locking device



April 1, 1930. v G. WATSON 1,752,824

LOCKING DEVICE Fil ed Oct. 22, 1928 George M17501? lnvenfbr.

I Patented Apr. 1, 1930 UNITED STATES ATENT OFFICE..-

' GEORGE wA'rsoN, or BEACONSFIELD, BRITISH COLUMBIA, CANADA Iooxme nEvIcE Application filed October 22, 1928. Serial No. 814,252.

This invent-ionrelates to improvements in locking'devices as applied'to safes, lockers, cupboards and rooms, and may also be used for automobile trucks, tool-rooms, and other like enclosures where it is desirable that sevferal'people have access without the necessity ofcarrying keys.

The object of the invention is to provide 'acheap, easily'manipulated, yet safe locking device for such enclosures, and one in which the combination of relative positional arrangement of the moving parts to'open the lock can be easily altered by the owner from time to time without the necessity of taking the whole mechanism to pieces. A'Iurther object is to provide a locking 'device which maybe unlocked from inside the enclosure'when required without upsetting the combination.

With such a lock the accidental shutting ofthe door of a strong-room while the at- 0f which is also capable of longitudinal or axial motion, which can be imparted to it by means of a knob or handle rigidly attached thereto. Secured to the inner end of this sleeve area pair of pointed pins placed eccentrically with respect tothe sleeve, and

capable of causing the displacing of the lock bar when advanced axially to such a position as to engage with a pinion actuating same. These pins, however, cannot be'so advanced until they penetrate through an intermediate plate or disc attached to a second sleeve concentric with thefirst, and pass in addition through a third plate or disc to'which is secured the lock actuating pinion above referred' to.

These sleevesare rotatably mounted inside of a spur pinion gearing therewith.

' I My invention is more clearly described by a third sleeve or cover, which is attached to the base plate of the lock. The latter is riveted or otherwise rigidly secured to the door of the enclosure and carries upon its rear or inside face the bolt mechanism consisting of a sliding bolt movingin guides and adapted by means of rack teeth to be moved, by means This spur pinion is mounted on an extension or spindlepassing through the base plate and terminating in a disc or diaphragm which is rotatably secured in the base of the thirc sleeve or cover. 1 I

There are this two discs through which the pins on the central sleeve must pass before being in a position to actuate the locking bolt. Each disc has a pair of holes drilled through it corresponding in pitch andeccentricity to the pointed pins. The central sleeve and the second sleeve must each be rotated until the pins in the former and the holes in the latter are opposite the holes in the third plate or bolt actuating disc. When this condition obtains, the central sleeve can be pushed inwards, the pins passing through 3'' the aligned hole in the discs, and then a turning movement of the knob or handle causes the spur pinionto move the locking bolt so as to open the lock.

reference to the drawings accompanying and forming part of this specification, in which:

Figure 1 represents a front View of the lock as seen from the outside.

Figure 2 represents a side View of the same.-

Figure 3 is a sectional plan taken on the line 33 in Fig. 1, and showing the internal construction.

Figure 4 is a part View ot-the inside or backof the lock and shows the locking bolt with rack, the guides for same, and the actuating pinion. I

-Figure 5 is a View of the plate or disc carried by; the second or intermediate sleeve, showing the arrangement of holes therein.

In these views 13 represents the base plate upon which the lock is built, 14 the outer cover containing the rotatable sleeves, 15 the intermediate sleeve, and 16 the inner sleeve, carrying the hand knob 17. The front faces of the cover 14, sleeve 15 and sleeve 16 are flush when the knob 17 is not depressed or pushed in, and upon each of these faces division marks indicated by the numerals 1 to 12 are cut, so that when the sleeves are rotated, their relative positions are indicated by means of the division marks aforesaid.

The central sleeve 16 is shorter than the sleeve 15, but is kept up in position fiush'with the members 15 and 14 by means of a coil compression spring 18, which bears at one end upon the inner end of the sleeve 16 and. at the other upon the back of the disc 19. The latter is secured into the end of thesleeve15 and is represented separately in Figure 5.

The cover 14 is secured to the base plate and has'rotatably mounted Within it the disc 20 secured by means of the retaining ring 21. The disc 20is extended axially to form the squared spindle 22 upon which is mounted the spur pinion 23 and, outside the cover plate 24, theturningknob 25.

Slidablymounted in guides 26 and 27 in the base plate 13 is the bolt 28, gearing with the pinion 23 by means of the rack38.

The bolt 28 is kept in the extended or locked position by means of the boxed compression spring 29, but can be secured in the off or retracted position after the door is opened by inserting the pin .30 into the hole 31 in the guide 27, a hole being drilled in the bolt 28 which registers with the hole 31 when the bolt is in theoft position.

The central sleeve 16 carries two cylindrical pointed pins 32 projecting from its inner face. These pins are unequally distant from the centre of the sleeve 16,. and are long enough topass through the disc 19 and into the disc 20, when the sleeve 16 is fully depressed. When thus depressed the pins 32 engage the disc 20, and when the knob 17 is turned can thus rotate the pinion 23 mounted uponthe extension 22of the disc 20. v

The discs 19 and 20 are each drilled with two through holes 33 and 34 corresponding to the pin centres 32, and with several dummy holes 35 which do not extend through, and it is only when the discs are turned so that the holes 33 and 34 in the disc 19 register with the corresponding holes in the disc 20, and that the sleeve1 6'is turned so that the pins 32 also register with these responding numbers on the top face of the sleeves 16, 15 and 14 underneath the indictor arrow 37 noted.

These numbers are shown at 5, 2 and 9 in Figure l and to open the lock the sleeves 16 and 15 must be rotated until the numbers 9 on the sleeve 16 and 2 on the sleeve 15 are 0pposite. the number 5 of the outer ring of numbers stamped on the outer cover 14, and

situated directly under the indicator 37. In

this position the central knob 17 can be depressed and'the pins 32 pass through the discs -19 and 20. The knob 17 if then turned, will rotate the pinion 23 and actuate the bolt 28.

The knob 25 engages with the extension 22 of the disc 20 and is situated inside of the door of the enclosure when the latter is closed up. It can be readily utilized to open the door from the inside on emergency, as by turning the knob 25 by hand the pinion 23 is caused to actuate the rack 38 and therefore the bolt '28 independently of the position or setting of the members 15 and 16.

It is alsojto be understood that the dials on the front faces of the members 14, 15 and 16 may be subdivided much more closely than as shown in Figure 1, each circle being divisible into one hundred or more equal parts, if giesired, thus making the setting of the discs ner.

Having now fully described my invention, what I claim and desire to be protected in by Letters Patent, is:

' A locking device comprising, a securing bolt having a toothed rack thereon, a pinion engaging said rack,'a spindle engaging said pinion and. integrally extended at one end to form a circular plate whose surface is rightangular to the axis of said spindle, a'base plate carrying guideways slidably engaging said bolt, a cylindrical casing secured to said base plate and adapted to revolvably receive the periphery of said circular plate, an intermediate sleeve revolvable within said casing, a second circular plate parallel to and slidable against the surface of first said circular plate and engaged revolvably with said intermediate sleeve, an inner revolvable sleeve of less length than said intermediate sleeve and provided with an external handle, said inner sleeve having cylindrical pins projecting beyond its'inner face, a helical compression spring within said intermediate sleeve and abutting against said inner face and said second circular plate, both the said circular plates having similar and corresponding perforations adapted to register with each other and to receive and engage the ends of said projecting pins, partial perforations on the inwardly facing surfaces of both said plates, said partial perforations being spaced apart on concentric centre lines and adapted to receive the extremities of said projecting pins, external means for rotating said intermediate sleeve and indicating means on the adj acent external end faces of said casing and said sleeves whereby their relative angular positions may be identified.

In testimonywhereof I a-flix my signature.

GEORGE WATSON. 

